This is a hypothetical dataset based on Cattaneo, M. D. 2010. Efficient semiparametric estimation of multi-valued treatment effects under ignorability. Journal of Econometrics 155: 138-154. https://doi.org/10.1016/j.jeconom.2009.09.023.
Do not use this dataset for serious research purposes.
It has been manipulated to ease exposition of teffects commands.